Demountable-rim lock



T. B. WOHTHINGTON.

DEMOUNTABLE RIM LOCK.

APPLmATloN FILED MAY 13, 1919.

1,371,832. Patented Mar. 15,1921.

2 sHEEs-SHEU 1.

@noauto/c T. B. WORTHINGTON.

,DEMOUNTABLE' RIM LOCK.

APPLICATION FILED MAY 1a, 1919.

1,371,832, Patented Mar. 15, 1.921.

ZSHEETS-SHEET 2.

of Franklin and tate of Pennsylvania, have UNITE DEMDUNTABLE-BIM LOCK.

narines.

Specication of Letters Patent.

Fatented Mar. 15, `1921.

.Application flled Hay 13, 1919. Serial No. 296,777.

To ZZ whom t may concern.'

Be it known that I, T ILLMAN B. Won'rn'.- INGToN, a citizen ofthe UnitedStates of America,'residin at Scotland, in the county invented new anduseful Improvements in Demountable-Rim Locks, oi which the following isa specification.

The object of the invention is to provide relatively simple andefiicient means for locking a demountable rim in place upon the usual ormain wheel rim under such'conditions as to provide for taking up 10stmotion due to wea-r, and to compensate for expension and contractionincidentI to temperature and for unavoidable variations inthe dimensionsof theparts, so as to secure the same against relative vibration inuse.l and to this end the invention consists in a construction,combination and relation of parts of which a preferred embodiment ishereinafter particularly described, it being understood that changes intorni and proportions ina-y be resorted to within the scope ci theappended claims-.without departing from the principle involved. e

in the drawings:

Figure 1 is a side-view ci a conventional automobile wheel provided withrim inciring means embodyin the invention, it being understood that t eillustrated wheel is merely typical and may be variousl modiiisd as tostructure, number ci spo es and the like without adecting the meansconstituting the subject matter oi this invention. Fig. 2 is a detailsectional viewtairen longitudinally ci the tire in tire piane or theoperating stem for the locking elements.

Fig. 3 is a transverse sectional view talien in the plane of one oi theanchor pins.

Figs. 4- and 5 are edge views showing opposite sides of the activeiociring element.

Fig. is a developed view oi the active locking eiement.

vFig. )Z is a similar view oi the companion iocking element or eliy.Merely for purposes illustration the.

invention is shown in connection with a wheel having a ielly 10, thedemountabie rim 11, inner tube iand casing1 13, and occupying the s acebetween said elly and demountable rim are the' annular iocking elements1e and 15, of which the latter is thev elly rim or xed band and theformer a ring. for coperating lrocking' action there-- 'expandin Asillustrated, the felly is slightly beveled at its periphery as shown at16 to form an inclined bed or seat for the similarly inclined bodyportion of the fixed rim l5 which at one edge is upturned at an angle to-form a cam or buffer 17 upon the surface of' which one edge of thedemountable rim bears, and by which an expansive strain is apglied tosaid demountable rim.

eated upon the exterior surface of the body portion of this fixed rim isthe locking ring 14, corresponding with the fixed rim but" tapered inthickness from its outer toward its inner edge, as shown clearly in Fig.3 with an external dared head 18 of which the upper bead 19 and lowerbead 20 bear respectively a ainst the edge of the demountable rim, andthe adjacent edge of the xed rim. -Obviously, the inward movement of thelocking ring, that is to say, the axial movement thereof relative to thexed rim will cause the clampin of the demountable rimbetween the camange '17 oit the xed rim and the bead 19 of the locking ring while thewedge-like form or the body portion of the iatter will have aspreadingor action upon the demountable rim, partlculariy when the movementthere# o is in relation to the outer' transversely inf clined surface cithe fixed rim, and this movement oi the ring is edected by means ci camslots 21 :tormed in the iocking ring in connection with studs 22 whichconstitigte the terminals ci anchor pins 23 mounted. in

and carried by the telly, as also` shown c-iearlyfin 3. These anchorpins may 'be secured in place by means oi engaging nuts 24 and theoutwardly turned thrusts thereoi which project radially trom the surfaceofthe ieiiy passing through slots 25 in the Yedge oi'tthe iixedrim, soas to secure the iatter against the rotary movement and gripping on theWheei'rim, winiie the turning oi the iocking ring in the directionindicated by thearrow in itin'. i cause the cam slots 21 to draw sai'ring inward and thus produce the clamping action above inentioned. 1 I lThis turning or orbitai movement oi the iocking ring may be producedyorexample, by providi the saine at any suitable point with an inc inedtoothed rack 26, engaged p jg 1,371,832

projects to the inside of the felly and is rovided with a Wrench or keyseat 29. gaid stem or spindle is movable in a bearing sleeve 30 properlysecured in the felly and a locking nut threaded upon the spindle servesto lock the latter and hence the rack'| and consequently the lockingring or member I14 in such position as in coperation with the passivemember to maintain the ldemountable rim in position.

In applying the device to a Wheel, the fixed rim which forms the seat orbearing for the 'active member may first be positioned upon the folly,and after the del`5 mountable rim has been fitted thereover the lockingring may be applied from the opposite side after which the rotary ororb1tal adjustment thereof will lock the elements in their properrelations, it being understood that looseness may be taken up from timeto time as may be required to compensate for variations of temperatureand the like.

v The invention having been described, what is claimed as new and usefulis: 1. The combination with a felly and demountable rim of a fixed rimand locking ring arranged in concentric overlapping relation between thetwo for clamping the latter, the said rin being provided withtransversely directe cam slots for engagement with stationary guidestuds and also having an obliquely disposed rack'extending parallel withthe slots, and an axially radial pinion mounted upon the felly :for theengagement With said rack to impart rotary or orbital movement to saidring.

the studs, and means for impartingrotary or orbital movement to thering.

3. The combination with a felly and demountable rim, of a fixed rim andassociated overlapping locking ring carried on the felly andprovided'each with means for respectively engaging the opposite edges ofthe demountable rim, radial guide studs carried by and rejecting beyondtheA periphery of the fell) the said ring being provided With cam slotsin which said` studs engage, a radial bearing mounted in the elly, aspindle mounted in the bearing, the locking ring beingA provided with anobliquely disposed rackparalleling the cam slots, a pinioncarried by thespindle and meshing with the rack, and locking means for the spindle topreclude rotary movement of the same. l

In testimony whereof he aiiixes his signature.

TILLMAN B. WORTHINGTON.

